What is the differences between refugee and asylum seeker?

Professor need 10 annotated bibliography about refugees experiences after resettlement in the United States.
Paper should focus on who is a refugee? What are the policy about refugee resettlement in the United States? What is the differences between refugee and asylum seeker? What is resettlement in the United States? What are the statistics on refugees resettlement in the United States? When and why did the United States started helping refugees? What is the trend of refugees during the Obama, Trump and Biden administration? Why are African refugee coming to the United States? What are the agency that help refugees resettle in the United States? Which states in the United States that resettle more African refugee?